Retrieving an already-built file
from the shared cache
is usually a significant time-savings
over rebuilding the file,
but how much of a savings
(or even whether it saves time at all)
can depend a great deal on your
system or network configuration.
For example, retrieving cached files
from a busy server over a busy network
might end up being slower than
rebuilding the files locally.

In these cases, you can specify
the --cache-disable
command-line option to tell SCons
to not retrieve already-built files from the
shared cache directory: